A 10-kVA, 2000/400-V, single-phase transformer has resistances and leakage reactances as follows : R1 = 5.2 Ω, X 1 = 12.5 Ω, R2 = 0.2 Ω, X 2 = 0.5 Ω Determine the value of secondary terminal voltage when the transformer is operating with rated primary voltage with the secondary current at its rated value with power factor 0.8 lag. The no-load current can be neglected. Draw the phasor diagram.

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Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.